P4 0.0 / 5 ? PhysicsForces and MotionGCSEOCR Created by: Loren_spainCreated on: 25-01-16 18:25 How do you find the speed of an object? Speed= Distance travelled/time taken 1 of 15 How do speed cameras work? Use painted lines on the road to measure the distance travelled by a vehicle in a set time 2 of 15 What does GRADIENT mean? Speed 3 of 15 What does Gradient tell you in a distance-time graph? The velocity 4 of 15 What does displacement mean? When distance is given with a particular indication of direction. 5 of 15 What does Instantaneous velocity mean? The speed and direction at a given moment of time 6 of 15 What does Velocity describe? Both speed and direction 7 of 15 What does Acceleration mean? The change in velocity in a certain amount of time 8 of 15 How do you work out Acceleration? Acceleration= Change in velocity/ Time taken 9 of 15 What does the gradient show in a velocity-time graph? Acceleration 10 of 15 What is partner forces/ Interaction pair? When one object forces on another subject, it always experiences a force in return 11 of 15 What is a reaction force? An equal and opposite force upwards 12 of 15 What does friction move? When an object is moving relative to another one, both objects experience a force in the direction that opposes the movement 13 of 15 Is friction a reaction force? Yes- It happens in a result of an applied force 14 of 15 What are the three types of friction? Friction between solid surfaces which are gripping- friction between feet and ground allows you to push against it and move fowards 15 of 15
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